Mozilla Foundation Security Advisory 2015-99

Site attribute spoofing on Android by pasting URL with unknown scheme

Announced

September 22, 2015

Reporter

Jordi Chancel

Impact

Moderate

Products

Firefox

Fixed in

Firefox 41

Description

Security researcher Jordi Chancel reported that on Firefox for
Android, when a URL is pasted with an unknown protocol, such as secure: or
httpz:, the pasted URL is shown in the addressbar but no navigation occurs.
Other addressbar attributes present before this pasted URL is entered will continue to be
rendered. This could lead to potential spoofing by a malicious site.

This issue only affects Firefox for Android and does not affect Firefox on
OS X, Linux, or Windows operating systems.